finite spire
Concentration: I always wanted to make a level that leaned heavily into wave + dash orb gameplay. I think it could make for some really cool music sync.
Brainstorming: one of my friends said to make a level set on a planet made of wood, where you're a termite eating through the wood. that could probably make an interesting altergame platformer level.
SCAMPER: Thought of a neat idea: Deadlock but with coins in every section. I always liked deadlock's coin routes, so completely filling the level with coin routes at every section could put a more memory-heavy, swag route emphasis on it.
Ramsey Method: A level that noticably ramps up in difficulty as it progresses, themed around the different colors of stars could be cool. Starting at red stars (the coldest) then orange, yellow, white and finally ramping up to a blue star finale (the hottest). https://en.wikipedia.org/wiki/Stellar_classification.
dusky hull
eager turtle